Diving mask



FIG. 1 is an elevation view of diving mask showing my new design:

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is bottom plan view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for diving mask, as shown. 